pattison



(ModeL) 2 Sheets-Sheet- 1.

R. PATTISON. STBAM INJEGTOR;

No. 596,121. Patented Dec. 28,1897.

flilnewyem- Invenfm.

(ModeL) 2 Sheets-Shet 2.

R. PATTISON. STEAM INJECTOR.

No. 596,121. Patented Dec. 28,1897;

fiilnewww:- [nweniaw- ATENT FFEQEQ RICHARD PATTISON, OF NEW YORK, N. Y.

STEAM-INJECTOR.

SPECIFICATION forming part of Letters Patent N0. 596,121, dated December 28, 1897.

Application filed April 7 l 89 7.

T0 aZZ whom, it may concern:

Be it known that I, RICHARD PATTISON, of New York, in the county and State of New York, have invented a new and useful Improvement in Steam-Injectors, of which the following is a specification;

This invention is an improvementin steaminjectors of the double-jet or lifting-andforcing type.

This invention relates particularly to an improvement in the injector set forth and claimed by me in a pending application which was filed January 19, 1897, Serial No. 619,714, and allowed March 19, 1897.

The object of this invention is to provide an injector in which the movement of the operating-valve will permit the escape of any back pressure in the pipe or tube between the injector and the boiler check-valve which .to liftand force the water perfectly and instantaneously.

A further object of this invention is to so arrange the ports in the valve which controls admission of steam to the lifting and forcing chambers, the overflow, and the escape of the back pressure that the throw of the valveoperating handle will be very short. A practical embodiment of my invention is represented in the accompanying drawings, in which Figure 1 represents an outside view of the injector, the valve-operating handle being shown in full lines in the position which it assumes when all the ports are closed and in dotted lines in the three positions which it assumes during its movementthe first when the steam is admitted to the forcing-chamber only by way of the lifting-chamber, communication being established from the forcingchamber to the overflow-chamber the second when the escape of back-pressure steam is permitted through the valve to the overflow, communication. still being established between the steam-inlet and forcing-chamber by way of the lifting-chamber and the overflow-port in the forcing ehamber closed, and

Serial No. 631,079. (ModeL) the third position showing the direct commu nication of steam to the forcing-chamber and to the lifting'chamber, the back-pressure escape and the overflow-port from the forcingchamber both being closed. Fig. 2 is an outside view of the reverse side of the injector from that shown in Fig. 1 to show the outlet of the overflow-chamber. Fig. 3 represents a vertical longitudinal central section through the injector, the valve or cook being shown in its closed position. Fig. 4 is a side view of the valve-plug. Fig. 5 represents a detail view showing theposition of the valve-plug when steam is admitted to the forcing-chamher only through the lifting-chamber, the overflow-port in the forcing-chamber. being shown open to the overflow-chamber. Fig. 6 represents in detail the next position of the valve-plug, in which communication'is established through the back-pressure port to the overflow, the overflow-port in the forcingchamber being closed; and Fig. 7 represents the third position of the valve-plug in detail, in which steam is admitted directly to the forcin g-ohamber, and directly to the lifting-chamber, the back-pressure port being closed and the overflow-port in the forcing-chamber being closed.

The injector-casing is denoted as a whole by A, its steam-inlet by at, its water-inlet by a, and its discharge opening or outlet by a to which discharge-opening may be attached any suitable pipe ortube (not shown) leading to the boiler. The steam-chamber is denoted by B, the lifting-chamber by G, the forcing-chamber by D, and the overflow chamber by E. The injector-casing is further provided with a suitable valve-seat f, to which is fitted a rotary valve or cook F, having a suitable stem f, to which is attached a suitable operating handle f for turning-the said valve. The steam-inlet a is provided with a suitable port a opening into the valve-seat f. The steam-chamber B' is provided with a suitable port I), openinginto the valve-seat f a short distance from the port a The overflow-chamberE is provided with a port 6, opening into the valve-seat f, and adjacent to the saidport is located a suitable overflow-port d, opening from the foreing-chamber D into the valve-seat. A steamport it also opens from the valve-scat f into the foreing'chamber D through the forcingnozzle, to be hereinafter described.

The lifting-chamber O communicates with the forcing-chamber D through a lifting-tube G, and the steam-chamber l3 connects with the lifting-chamber 0 through a steam-nozzle g, which nozzle is located in position to direct the steam into the lifting-tube G for liftin g the water into the forcing-chamber D. A forcing-tube H is located in the forcing-chamberl), near its outlet or discharge opening a and a steam-nozzle h is located in position to direct the steam which enters the port (1, when the valve F is full open, into the forcingtube II for forcing the water within the chamber D into the boiler. The casing A is also provided with a back-pressure chamher or conduit I, which opens at one end, as at 1', into the discharge end of the injector beyond the forcing-chamber D. The other end of the baelcpressure chamber I opens into the valve-seat F to form a port t", which port t" is located between the steam-inlet port a and the steam-port d.

The valve 1 is provided with a suitable through-portf, which port is considerably larger at one side of the valve and'is gradually reduced through to the other side of the same. The valve 1* is further provided with a suitable through -port f which extends through the valve F at an angle to the port and in the present instance passes through a web f extending through the through-portj, the said web being spaced from the bottom and top of the said portf' to permit the free passage of the steam above and below the web for permitting the steam to pass from the inlet a through the portf into the steamport (7. when the valve is turned to full open. The through-port f serves also to open eommui'iication between the steam-inlet a and the steam-chamber B through the ports (t and b. The through-portf serves, when the valve is in one position, to open communication between the forcing-chamber D and the overflow-chamber E through the ports d and (2, respectively, and when in another position to open communication between the back-pressure chamber I through its port 1" and the overflow-chamber E through its port 6. The casing A is provided upon its exte rior with stops a a, located in position to be engaged by the operating-handle f for limiting its movements.

The operation of my invention is as follows: Supposing that the valve be closed, as shown in Figs. 1 and 3, and it be desired to force the water into the boiler, the valve-operating handle is swungaround until the valve is in the position shown in Fig. 5, when the port f will have opened communication between the steam-inlet and the forcing-chamber by way of the lifting-chamber and the port f will have open communication between the forein gchamber and the overflow-chambe1x The steam thus admitted will lift water into the chamber 0 and from thence into the chamber D, and when the chamber D has been filled the water will overflow through the chamber E. The movement of the valve-operating handle is continued until the valve is in the position shown in Fig. 6, when the port f will have opened communication between the back-pressure chamber I and the overflow-chamber E, at the same time cutting oil the overflow-port d from the forcingchamber. \Vhen the valve is in this position, any pressure of steam which may be within the pipe or tube leading from the outlet end of the injector to the boiler between the injector and the check-valve will be allowed to escape through the overflow-chamber E to the atmosphere, thereby leaving the said tube or pipe in proper condition to receive the water through the forcing-tube II, when the valve is turned to full open. The valve-operating handle f is then caused to complete its swinging movement, when the valve will be caused to turn into the position shown in Fi 7,in which steam is admitted directly through the through-port f into the forcing-chamber D through the port d and forcing-nozzle h.

In this position the through-port f has cut off communication from the back pressure I to the overflow-chamber E. In the last two above-described positions communication has been continuouslymaintained from the inlet a through the steam-chamber B and liftingchamber C.

It will thus be seen that the movement of a single operating-valve controls the admission of steam to the lifting-chamber and directly to the forcing-chamber and opens and closes communication between the forcingehamber and the overflow-chamber and between the backpressure chamber and the overflow-chamber. It will also be seen that the valve as above constructed is caused to have a very limited movement for controlling the several operations of the injector.

It is evident that slight changes might be resorted to in the construction and arrangement of the several parts without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

\Vhat I claim is- 1. In an injector, the combination with a casing provided with steam and water inlets and an outlet, a forcing-chamber, an overflow-chamber, a back-pressure chamber, of means for opening and closing communication between the steam-inlet and forcingchamber, between the forcing-chamber and overflow chamber, and between the backpressure chamber and overtlow-chamber,substantially as set forth.

2. In an injector, the combination with a casing provided with steam and water inlets and an outlet, a lifting-chamber, a forcingchamber, an overflow-chamber and a backpressure chamber, of a single valve arranged to open and close communication between the steam-inlet and the lifting-chamber the steam-inlet and the forcing-chamber, the foreing-chamber and the overflow-chamber and the back-pressure chamber and the overflowchamber, substantially as set forth.

3. In an injector the combination with a casing provided with steam and water inlets and an outlet, a lifting-chamber, a forcing chamber, an overflow-chamber and a backpressure chamber, of a single valve for controlling the admission of steam, adapted by successive movements to firstly open communication bet-ween the steam-inlet and lifting-chamber, the forcing-chamber and overflow-chamber; secondly close communication between the torcing-chamber and overflowchamber and open communication between the backpressure chamber and overflowchamber and finally to open communication between the inlet and the forcing-chamber and close communication between the backpressure chamber and overfloW-chamber,substantially as set forth.

4. In an injector the combination with a casing provided with a valve-seat, a steaminlet opening into the valve-seat, a steamchamber opening into the valve-seat, a forcing-chamber having an overflow-port and a steam-inlet port both opening into the valveseat, a lifting-chamber communicating with the steam-chamber and forcing-chamber and a back-pressure chamber opening into the valve-seat, of a rotary valve provided with a through-port for opening communication between the steam-inlet and the steam-chamher and between the steam -inlet and forcingchamber and provided with a second throughport adapted to open communication between the forcing-chamber and overflow-chamber RIOHA RD PATTISON.

Witnesses:

FREDK. HAYNES, O. S. SUNDGREN. 

